1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
use crate::*;
use buffer::HasDimensions;
use winit::dpi::{Size, PhysicalSize};
use winit::event_loop::EventLoopWindowTarget;
use winit::window::WindowId;
pub struct Window {
pub controller: Box<dyn WindowController>,
window: winit::window::Window,
pixel_scale: u32,
buffer: Buffer,
surface: softbuffer::Surface,
surface_dimensions: Dimensions,
#[allow(dead_code)] context: softbuffer::Context,
current_render_hint: RenderHint,
previous_cursor_position: Option<Point>,
}
impl Window {
pub fn new(event_loop: &EventLoopWindowTarget<()>, controller: Box<dyn WindowController>) -> Self {
let pixel_scale = controller.pixel_scale().get();
let increment = PhysicalSize { width: pixel_scale, height: pixel_scale };
let mut builder = winit::window::WindowBuilder::new()
.with_title(controller.title())
.with_resize_increments(increment);
if let Some(exact_dimensions) = controller.exact_size() {
let exact_size = dim_to_size(exact_dimensions * pixel_scale);
builder = builder
.with_resizable(false)
.with_inner_size(exact_size)
.with_min_inner_size(exact_size)
.with_max_inner_size(exact_size);
} else if let Some(initial_dimensions) = controller.initial_size() {
builder = builder.with_inner_size(dim_to_size(initial_dimensions * pixel_scale));
if let Some(min_dimensions) = controller.minimum_size() {
builder = builder.with_min_inner_size(dim_to_size(min_dimensions * pixel_scale));
}
if let Some(max_dimensions) = controller.maximum_size() {
builder = builder.with_max_inner_size(dim_to_size(max_dimensions * pixel_scale));
}
};
let window = builder.build(event_loop).unwrap();
let context = unsafe { softbuffer::Context::new(&window) }.unwrap();
let surface = unsafe { softbuffer::Surface::new(&context, &window) }.unwrap();
Self {
controller,
window,
pixel_scale,
buffer: Buffer::new(Dimensions::ZERO),
surface,
surface_dimensions: Dimensions::ZERO,
context,
current_render_hint: RenderHint::Redraw,
previous_cursor_position: None,
}
}
pub fn id(&self) -> WindowId {
self.window.id()
}
pub fn update_title(&mut self) {
self.window.set_title(&self.controller.title());
}
pub fn update_cursor_icon(&mut self) {
let icon = self.controller.cursor_icon().unwrap_or(CursorIcon::Default);
self.window.set_cursor_icon(icon);
}
/// This method only requests that the window size be changed; it does not
/// alter any buffer sizes or struct fields. When the window size eventually
/// changes, the state updates are handled by `resize_buffer_and_surface`.
pub fn update_window_size(&mut self) {
let pixel_scale = self.controller.pixel_scale().get();
if let Some(dimensions) = self.controller.exact_size() {
// Without this early return, the constant re-setting of the window
// size prevents the window from being able to be positioned with the
// bottom edge below the screen bounds.
if pixel_scale == self.pixel_scale
&& dimensions * pixel_scale == self.surface_dimensions {
return;
}
self.window.set_resizable(false);
let size = dim_to_size(dimensions * pixel_scale);
self.window.set_min_inner_size(Some(size));
self.window.set_max_inner_size(Some(size));
self.window.set_inner_size(size);
} else {
self.window.set_resizable(true);
let size = self.controller.minimum_size().map(|d| dim_to_size(d * pixel_scale));
self.window.set_min_inner_size(size);
let size = self.controller.maximum_size().map(|d| dim_to_size(d * pixel_scale));
self.window.set_max_inner_size(size);
if pixel_scale != self.pixel_scale {
let increment = PhysicalSize { width: pixel_scale, height: pixel_scale };
self.window.set_resize_increments(Some(increment));
self.resize_buffer_and_surface(self.surface_dimensions);
}
}
}
pub fn update_cursor_visible(&mut self) {
self.window.set_cursor_visible(self.controller.is_cursor_visible());
}
/// Resize the frame buffer and screen surface to the new size of the window.
pub fn resize_buffer_and_surface(&mut self, physical_dimensions: Dimensions) {
if let Some((width, height)) = dim_to_nonzero_size(physical_dimensions) {
self.surface.resize(width, height).unwrap();
self.surface_dimensions = physical_dimensions;
};
self.pixel_scale = self.controller.pixel_scale().get();
let logical_dimensions = physical_dimensions / self.pixel_scale;
if logical_dimensions != self.buffer.dimensions() {
self.buffer.resize(logical_dimensions);
self.controller.on_resize(logical_dimensions);
self.current_render_hint = RenderHint::Redraw;
}
}
pub fn move_cursor(&mut self, position: Point) {
// Convert cursor position from physical position to logical position.
let pixel_scale = self.controller.pixel_scale().get() as i32;
let logical_position = Point::new(position.x / pixel_scale, position.y / pixel_scale);
// The cursor position is rounded to i32 from f64, so we need to ignore
// duplicate consecutive cursor positions.
if self.previous_cursor_position != Some(logical_position) {
self.previous_cursor_position = Some(logical_position);
self.controller.on_cursor_move(logical_position);
}
}
pub fn handle_render_request(&mut self) {
if let RenderRequest::Render(hint) = self.controller.render_request() {
self.current_render_hint &= hint;
self.window.request_redraw();
} else if self.current_render_hint.is_redraw() {
self.window.request_redraw();
}
}
pub fn render(&mut self) {
// If the surface dimensions are zero, the first resize event hasn't yet
// come through, and the Surface object will panic when `.present()` is
// called on it later in this method. We will instead skip rendering for
// this frame, knowing that the pending resize will trigger a re-render.
if self.surface_dimensions.is_zero() {
return;
}
let scale = self.pixel_scale as usize;
let physical_dim = self.surface_dimensions;
let logical_dim = self.buffer.dimensions();
self.controller.on_render(&mut self.buffer, self.current_render_hint);
let buffer = self.buffer.as_u32_slice();
let mut surface = self.surface.buffer_mut().unwrap();
if scale == 1 {
let overlap = std::cmp::min(buffer.len(), surface.len());
surface[..overlap].copy_from_slice(&buffer[..overlap]);
} else {
let logical_width = logical_dim.width as usize;
let logical_height = logical_dim.height as usize;
let physical_width = physical_dim.width as usize;
let physical_content_width = logical_dim.width as usize * scale;
let row_excess = physical_width.saturating_sub(physical_content_width);
let mut bi: usize = 0;
let mut si: usize = 0;
let mut row_start: usize = 0;
let mut row_end: usize = 0;
for _y in 0..logical_height {
for py in 0..scale {
if py == 0 {
row_start = si;
for _x in 0..logical_width {
surface[si..si+scale].fill(buffer[bi]);
si += scale;
bi += 1;
}
// Fill the excess space on the right edge with black.
surface[si..si+row_excess].fill(0);
si += row_excess;
row_end = si;
} else {
surface.copy_within(row_start..row_end, si);
si += physical_width;
}
}
}
// Fill the excess space on the bottom edge with black.
let excess = surface.len().saturating_sub(si);
surface[si..si+excess].fill(0);
}
surface.present().unwrap();
// Reset current_render_hint back to the lowest variant for the next frame.
self.current_render_hint = RenderHint::Update;
}
}
fn dim_to_size(dimensions: Dimensions) -> Size {
Size::Physical( PhysicalSize {
width: std::cmp::max(1, dimensions.width),
height: std::cmp::max(1, dimensions.height),
})
}
fn dim_to_nonzero_size(dimensions: Dimensions) -> Option<(NonZeroU32, NonZeroU32)> {
let width = NonZeroU32::new(dimensions.width)?;
let height = NonZeroU32::new(dimensions.height)?;
return Some((width, height));
}
|
